Gamagōri (蒲郡市, Gamagōri-shi) is a city in Aichi Prefecture, Japan. As of 1 October 2019, the city had an estimated population of 80,063 in 32,800 households, and a population density of 1,407 persons per km². The total area of the city is 56.92 square kilometres. Gamagōri is situated on the coast of Mikawa Bay on the Pacific Ocean in southeastern Aichi Prefecture. Sheltered by Chita Peninsula and Atsumi Peninsula, the climate is mild, and parts of the city are within the borders of the Mikawa Wan Quasi-National Park. Records of place names in present-day Gamagōri have been found from the Nara period. The area was divided into several shōen during the Heian period, largely under the control of the Udono clan. During the Edo period, most of the area was tenryō territory ruled directly by the Tokugawa shogunate through hatamoto administrators, with portions controlled by Yoshida Domain and Okazaki Domain. After the start of the Meiji period, Gamagōri Village in Hoi District, Aichi Prefecture was proclaimed on October 1, 1889. Gamagōri was elevated to town status on October 6, 1891. The area of the town expanded through annexation of the neighbouring villages of Toyooka, Kaminogo and Shizusato on July 4, 1906. The town escaped damage in World War II, but the 1945 Mikawa earthquake caused considerable damage to parts of Gamagōri. The city of Gamagōri was proclaimed on April 1, 1954, when the town of Gamagōri merged with the neighbouring town of Miya and village of Shiotsu. The village of Otsuka joined Gamagōri on October 1, 1956, followed by Katahara on April 1, 1962, and Nishiura on April 1, 1963. Gamagōri is a regional commercial centre and fishing port, with a mixed economy of light manufacturing and agriculture. Gamagōri is also noted for its production of hothouse oranges.